ἰσότης/isotēs

This word is an idea. It is a noun.

This word can mean fairness. When used in this way, this word is used to talk about things that are done in a right or fair way.
This word can mean equality. Two things have equality when they are the same in number, size, or quality.

See 2 Corinthians 8:13, 14; Colossians 4:1